Book cipher
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A book cipher is a cipher in which each word or letter in the plaintext of a message is replaced by some code that locates it in another text, the key.
The King James Bible, a highly available publication suitable for the book cipher.
Silence Dogood
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Silence Dogood was the pen name used by Benjamin Franklin to get his work published in the New-England Courant, a newspaper founded and published by his brother James Franklin. This was after Benjamin
Book cipher
…2004 film National Treasure, a book cipher (called an "Ottendorf cipher") is discovered on the back of the U.S. Declaration of Independence, using the "Silence Dogood" letters as the key text. The protagonists of the Matthew Reilly novel The Six Sacred Stones used a book cipher to send confidential messages to each…
Silence Dogood Essay in the New-England Courant